Comments on: REPL to the rescue! http://www.hackinghat.com/index.php/lisp/repl-to-the-rescue Tue, 20 Jul 2010 09:51:44 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Steve Knight http://www.hackinghat.com/index.php/lisp/repl-to-the-rescue/comment-page-1#comment-24417 Steve Knight Tue, 06 Oct 2009 14:00:37 +0000 http://www.hackinghat.com/index.php/lisp/repl-to-the-rescue#comment-24417 Ha! I would never have thought of that, simple now you mention it. Thanks! Steve Ha! I would never have thought of that, simple now you mention it.

Thanks!

Steve

]]> By: Jie http://www.hackinghat.com/index.php/lisp/repl-to-the-rescue/comment-page-1#comment-24002 Jie Thu, 17 Sep 2009 18:05:38 +0000 http://www.hackinghat.com/index.php/lisp/repl-to-the-rescue#comment-24002 There is a counting solution to the bridge problem. It's equivalent to counting possible arrangements of 13 cards and 3 spacer markers separating hearts, diamonds, clubs, spades ccc_ccccc_ccc_cc 3h 5d 3c 2s so this is equivalent to choosing 3 items out of 16 16!/(3!13!) = 560 There is a counting solution to the bridge problem. It’s equivalent to counting possible arrangements of 13 cards and 3 spacer markers separating hearts, diamonds, clubs, spades

ccc_ccccc_ccc_cc
3h 5d 3c 2s

so this is equivalent to choosing 3 items out of 16

16!/(3!13!) = 560

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